(3) In the upper realm there is indeed a change in the exterior as well. This is because in the upper realm the transition from Immaturity to Maturity and likewise every ascent involves new Pregnancy, Suckling and Mental Powers, as discussed in the teachings of the ARI. This implies that the entire structure is renewed, including the exterior.
A further problem is that we need to understand how in the upper realm the interior of Imma can become the interior of Zeir Anpin, given their different functions. Another problem is the very opposite of this: From where else could Zeir Anpin receive a new interior if not from the interior of the Partzuf above him, i.e. Imma?